Rail transit line and interval longitudinal section automatic design method and system

The invention provides a rail transit line and interval longitudinal section automatic design method. The method comprises the following steps: reading and storing line and interval longitudinal section design scheme data; drawing station longitudinal section contours and interval longitudinal section contours, marking interval start and end point mileage longitudinal sections, marking interval start and end point rail surface elevations, marking interval start and end point station longitudinal sections, marking interval connection channel and wastewater pump room longitudinal section contours, and marking interval control point longitudinal section contours; according to the method, automatic design of the urban rail transit lines and the interval longitudinal sections is achieved, the method is written into an AutoCAD secondary development program, the lines and the interval longitudinal sections are automatically designed on a computer, drawing and labeling are automatically conducted, the production mode